Create correct translation when visiting root page

We set `I18n.locale = :en` before each test, and so creating a new card
will automatically create English translations.

So visiting the Spanish page won't show the card, since no Spanish
translation exists for it. If we visit the klingon page after doing so,
the last used locale (Spanish) will still be used, and so the test will
fail.

Specifically creating Spanish translations instead of the English ones
makes the translations visible when visiting the Spanish homepage.

spec/features/localization_spec.rb

@@ -3,11 +3,13 @@ require 'rails_helper'
 feature 'Localization' do
 
   scenario 'Wrong locale' do
-    card = create(:widget_card, title: 'Bienvenido a CONSUL',
-                                description: 'Software libre para la participación ciudadana.',
-                                link_text: 'Más información',
-                                link_url: 'http://consulproject.org/',
-                                header: true)
+    Globalize.with_locale(:es) do
+      create(:widget_card, title: 'Bienvenido a CONSUL',
+                           description: 'Software libre para la participación ciudadana.',
+                           link_text: 'Más información',
+                           link_url: 'http://consulproject.org/',
+                           header: true)
+    end
 
     visit root_path(locale: :es)
     visit root_path(locale: :klingon)